5131878713 has 4 divisors (see below), whose sum is σ = 5526638628. Its totient is φ = 4737118800.

The previous prime is 5131878709. The next prime is 5131878727. The reversal of 5131878713 is 3178781315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3051789049 + 2080089664 = 55243^2 + 45608^2 .

It is a cyclic number.

It is not a de Polignac number, because 5131878713 - 2² = 5131878709 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5131878733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197379938 + ... + 197379963.

It is an arithmetic number, because the mean of its divisors is an integer number (1381659657).

Almost surely, 2^5131878713 is an apocalyptic number.

It is an amenable number.

5131878713 is a deficient number, since it is larger than the sum of its proper divisors (394759915).

5131878713 is a wasteful number, since it uses less digits than its factorization.

5131878713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394759914.

The product of its digits is 141120, while the sum is 44.

The square root of 5131878713 is about 71637.1322220537. The cubic root of 5131878713 is about 1724.8796345896.

It can be divided in two parts, 51318 and 78713, that added together give a palindrome (130031).

The spelling of 5131878713 in words is "five billion, one hundred thirty-one million, eight hundred seventy-eight thousand, seven hundred thirteen".